| 摘要 |
<p>Ceramics of the composition: LnxSr2-x-yCayBzM2-zO5+δ where Ln is an element selected from the f block lanthanide elements and yttrium or mixtures thereof; B is an element selected from Al, Ga, In or mixtures thereof; M is a d-block transition element or mixtures thereof; 0.01 ≤ x ≤ 1.0; 0.01 ≤ y ≤ 0.7; 0.01 ≤ z ≤ 1.0 and δ is a number that varies to maintain charge neutrality are provided. These ceramics are useful in ceramic membranes and exhibit high ionic conductivity, high chemical stability under catalytic membrane reactor conditions and low coefficients of expansion. The materials of the invention are particularly useful in producing synthesis gas.</p> |
